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These colorful images are long exposures from cameras on tripods following the light of robotic vacuums, the Roomba by irobot, giving the illusion of a room painted with light. And you thought those Roombas were only good for Cat Rides on YouTube and sucking up dirt.
In this last image, flying toy helicopters were used to add streams of light in the air:
Images courtesy of the roomba flickr group and Bobby B.(aka h8808)
And in case you'd like to try it yourself, here an article which shows you how to attach a camera to your Roomba.